Minor Earthquake M4.9 Earthquake — 5 km NNW of Ōmachi, Japan 5 km NNW of Ōmachi, Japan Source: USGS Earthquake Hazards Details Magnitude: 4.9 Depth: 10.0 km Location: 5 km NNW of Ōmachi, Japan Time: 2026-04-18 04:20 UTC